Wrench.



B. B. WHITNEY.

WRENCH. APPLIG 11111111111111111111 4.

1 wwwa L .NITED .STATSPATENT orrion :To/all it concern."v

Bron njWHITNEY, or

smannisn, M'aiivnassienon or onu-HALF 'ro Lynwoon B..

l wmrnnia or srnnnrfsn, MAINE.

.it known that I, Bion B. kVinrrnnr, a

`citizen of the `United States, residing at` Standish, in the countyv of- Cumberland and State of Maine, have invented certainnew and useful Improvements .in l7renchesof which the following? is `a,:speciiication.

My invention relates to improvements in wrenches, particularly, welladapted for use in connection with -pipesfrod's'or vthe like, while not necessarily Vrestricted `to such use.

. "The inventionaims 'to `provide a Wrench of the Vabove mentioned character, which-:rs1

exceedingly simple yin construction, and inexpensive to manufacture; to provide a wrench so constructed that the pressure upon the handle or lever thereof is directlytransmitted to the pivoted jaw; and toV provide a wrench having means for automatically lswingingthe pivoted jaw away from the work, upon the removal of pressure from the lever, whereby the Vjaw will not stick to the work.

In the accompanying drawings forming a part ofthisspecification and in which like 4 numerals are `employed to--` designate like parts throughout the same, Figure 1 is a side elevation of a wrench-embodying my invention, Fig. 2 is an enlarged fragmentary vside `elevation of the same, parts being shown insection for the purpose of illustration, and, Fig. 3 is a transverse -sectional view taken on line 3-3 of Fig. 2.

In the drawings, wherein for the purpose of illustration is sliown'a preferred embodiment of myinvention, the numeral 5 desig- Y nates the housing or frame, within which is mounted to reciprocate a shank 6 carried by a relatively stationarylongitudinally adjustable laterally extending jaw'7. Upon its inner face the jaw 7 is provided with teeth 8, as shown.` The shank 6 and the opening of the housing 5 receiving the same are preferably formed rectangular in crosssection, as clearly illustrated in Fig. 3.' The" housing 5 is providednear its kinner end kwith `a transverse opening 9, receiving a milledadjusting-nut l0, engaging ascrewthreaded extension 11 rigidly secured to the inner end of the sliank 6,as shown.'

Extending in the same direction with the relatively stationary jaw 7 are ears or extensions 12, projecting laterally beyond the shank 6 for a substantial distance, the housing `5 being provided between these ears with 'l Specification of Lettersatent. 'i Patented De@ i Application filed June-10, 1914.= SerialfNa 844,191'.

.has returnedv to-its position wanner; Y I

alongitudi-nal opening 13 as shown. l Arranged-between the-forward ends ofthe ears 1'21 is aswinging jaw 14, pivoted to the ears as .shown at `15. This jaw is provided upon itsii'inerV face-with teeth 16. The jaw -14 lia-sa shank-17 rigidly secured thereto, which carries; a suitably` stiff` leaf spring 18, rigidly secured thereto. i This ishank 17 and the leaf spring-..18 extend longitudinally of' and approximately `parallel.-withlthe sliiank 6, as

shown. The function of this leaf spring is to automatically swing ther pivoted jaw 14 faway from the relatively stationary jaw, to

release the work, when pressure is taken ofi` of the operating handle, as will be more fully explained. y

The numeral 19 designates an operating lever or handle carrying at its inner end a hand grip 20. At its outer end the operating lever is providedwith a lateral extension or crank 21, the free end of which is adapted to directlyV engage thevouter portion of the pivoted jaw 14 to swing the same toward the relatively stationary shank. The operating lever 19 is arranged between the spaced ears 12 and pivoted thereto, at the inner end of thelateral extension or crank 21, as shown The leaf spring 18 isv confined between the shank 6 and the operating lever 19, and is so tensionedv that it exerts pressure upon the operating lever, whereby the same tends to swing the pivoted jaw 14 away from the aw 7, when the operating lever 19 parallel with the shank 6, as shown in Fig.

In use, the nut 10 is operated whereby the jaws 7 and 14 are moved apart suiiiciently to receive the work, such as a pipe, rod or the like. The operator then takes hold of the hand grip20, and turns the pipe clockwise as is customary. During this operation, the operating lever 19 can partake of perceptible swinging movement with respect to the shank 6, the same turning upon the pivot 22, whereby crank 21 engages the outer end of the swinging jaw 14, swinging the same inwardly with respect to the stationary jaw 7 to increase the clamping engagement with thework. 'l/Vlien the operating lever 19 is i swung in an opposite direction to release the `work, spring 18 quickly'inoves the jaw 14 away from jaw 7 whereby this jaw disengages the work, allowing the wrench to be swung in an opposite direction or to be removed froni the pipe, if desired,V

Itis to be understood that the formy of my invention herewith shown and described isf to be takeny as a preferred example of the same, and that various changes in the shape,

size, and arrangement of parts may be .re-

sorted to Without departing from the spirit of the invention or the scope of the suh-` 'joined claim.

Having thus described my invention,` I claim -tionary jaw, a co-acting jaw arranged opposite the relatively stationary jaw and pivotally connected With the housing and carry- -ing at-its inner end anextension extending vlongitudinally of and approximately parallel with the shankya lever arranged uponv the sameside of the shank vvith the'rpi'voted jaw and provided at its free ends'with alaterally of-set portion adapted for` direct engagementwith the outerv end of the pivoted jaw and affordin". aspace between thesame and the shank for the longitudinally extend- Ying extension of the pivoted jaw, fand-a relatively lat leaf spring attached to the outer end of the longitudinal `extension on said pivoted jaw an'dfextending approximately parallel Withfthe shank Vand arranged bestantially asvdescribed..v In

In testimony whereof I aixmy signature in presenceof'two `Witnesses.v

lWiiln-esses':j- -v BRAGDON,' l.'

l ORIN P. DoLLoFF.

if and'pivotallyconnected with the `spaced ears tween the same and-the lpi'voted lever, sub- Bion B. WHITNEY.

" Copiee ot this patent may be obtained for ve cents each, by addressing` the' ommissionerpf Iatent's,`

. Washington,D..C. 5 1 p n 1' y 

